(ARA) – Which do you dread the most: buying a new car or visiting the dentist? For the average person, they may be equally painful. Buying a car can be very stressful and challenging; there is a lot to consider and a lot of money on the line. “Most people say it’s like having a tooth extracted,” says John Davis, host and executive producer of MotorWeek, the critically acclaimed PBS weekly automotive magazine. “Nobody enjoys it.” Davis and his staff want to change that. “We look at how…